British charity Oxfam makes up to £250,000 a year with its festival shops, supplying revellers with timely changes of clothes. And everything it takes is sorted here, in a warehouse outside Huddersfield.

A mountain of sacks – with labels such as Formal Saturday, Cashmere, Womad and Wedding Dresses – sit under a giant heater, ready to be shipped out. Oddly, this is stock Oxfam’s network of charity shops has already tried – and failed – to sell, thanks perhaps to volunteers who have let some real gems slip through their fingers. While fake furs and waterproofs go everywhere, each festival requires a different fashion edit.

At Bestival, Oxfam also stocks fancy dress – on ‘Formal Saturdays’ it provides everything you need to look like a country lady or gent. ‘And Paul Weller is playing on Sunday at Latitude, so we have Mod Sunday to encourage the boys to dress up as mods,’ says Morris.

Revellers often purchase Oxfam clothing at the Isle of Wight Festival

Men regularly purchase new wardrobes at the Oxfam festival stores

‘On the Isle of Wight, you’ll get four seasons in a day,’ adds Morris, with all the weary experience of someone who has gone to six festivals a year for the past three years. ‘And people can’t be bothered to go back to their tents so they buy what they need when they need it.’

Sixty days a year is spent getting stock ready – and donations of clothes are still needed – but it’s worth it. At last year’s Bestival, Oxfam made £43,000, with an average price of a tenner a piece.

‘At Leeds, a group of young boys will turn up and they’ll all buy tweed because they want to dress like their mates,’ says Morris. ‘Then they get a bit drunk and want fake fur. At festivals with an older demographic, people want more individual fashion.’

‘At the Royal Windsor Horse Show last month, we sold Barbours, high-end stuff,’ she says. ‘We dressed the Queen’s photographer in a Christian Dior suit for £100 when he turned up in jeans, because you’re not allowed to take photographs of the Queen while you are wearing jeans.’

Has Morris seen any major style changes at festivals in her time at Oxfam? ‘No, not really,’ she says. ‘It’s checked shirts, denim minis, the usual. People just want practical stuff that looks good.’ Good point. In fact, why pack anything at all? The festival stalls will have it covered.